David Walsh Blog

• By Todd GardnerSeptember 21, 2020

  Vital Web Performance

  I hate slow websites. They are annoying to use and frustrating to work on. But what does it mean to be “slow”? It used to be waiting for document load. Then waiting for page ready. But with so many asynchronous patterns in use today, how do...

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• By David WalshSeptember 21, 2020

  Remove the Search Input Clear(x) Icon

  I really appreciate the amount of different <input> elements we've received over the past decade. These elements don't just bring a new semantic advantage, but also provide UI helpers, which in many cases are useful. In a recent case, I found a UI element...

• By David WalshSeptember 14, 2020

  5 Awesome JavaScript Promise Tricks

  The Promise API changed the game in JavaScript. We went from abusing setTimeouts and settling for synchronous operations to doing everything possible to leverage this new async API. Let's check out a handful of awesome Promise API tricks!Cancel a fetch RequestOne problem we...

• By David WalshSeptember 10, 2020

  Logical Assignment Operators

  I love JavaScript, it's my favorite programming language, but I love dipping into other languages because they offer a new perspective on coding paradigms. There've been syntax additions to JavaScript that I've seen I found interesting (think ?? in optional chaining) and...

• By David WalshAugust 19, 2020

  Match Emojis with Regular Expressions

  When experimenting with unicode property escapes, to identify accented letters in strings, it reminded me of a question I had a few years ago: what is the best way to identify and then replace emojis in a string? I first noticed this practice...

• By David WalshAugust 18, 2020

  Simple Node.js Proxy

  When I wanted to refresh my React.js skills, I quickly moved to create a dashboard of cryptocurrencies, their prices, and and other aspects of digital value. Getting rolling with React.js is a breeze -- create-react-app {name} and you're off and running. Getting the API...

• By David WalshAugust 6, 2020

  Match Accented Letters with Regular Expressions

  Regular expressions are used for a variety of tasks but the one I see most often is input validation. Names, dates, numbers...we tend to use regular expressions for everything, even when we probably shouldn't.The most common syntax for checking alphabetic characters is A-z but what if...

• By Kyle SimpsonAugust 5, 2020

  Expanding the Future (of Dev Tooling) with AI

  I'm writing to share some news that I'm genuinely excited about, not even just for me but for the rest of the developer community.Many of you know that I've been working with companies all over the world for nearly a decade, helping their developers learn JS...

• By David WalshAugust 5, 2020

  How to Earn Interest with Bitcoin

  When I was young I remember looking at my bank book and seeing nice interest payments for cash I had in the bank. Fast forward to today and banks are giving essentially nothing for interest -- your money just sits there collecting dust. In an ideal...

• By David WalshAugust 3, 2020

  Promise.allSettled

  The Promise object has many useful functions like all, resolve, reject, and race -- stuff we use all the time. One function that many don't know about is Promise.allSettled, a function that fires when all promises in an array are settled, regardless of whether...